Consolidated Statements of Equity Statement (USD $) In Millions, unless otherwise specified		Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Treasury Stock [Member]	Parent [Member]	Noncontrolling Interest [Member]
Balance as of December 31, 2012 at Dec. 31, 2012		$ 840	$ 412	$ 492	$ 6,525	$ (517)	$ 6,145	$ 767	$ 73
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Comprehensive Income	[1]	801			735	63		798	3
Dividends		(81)			(81)			(81)
Noncontrolling interest adjustments	[2]	24						0	(24)
Shares repurchases		(500)		(152)			348	(500)
Employee stock plans, net of tax benefit		57		(104)			(161)	57
Change in redemption value of redeemable noncontrolling interest		2			2			2
Other		(13)			(13)			(13)
Net Income (Loss) Attributable to Redeemable Noncontrolling Interest		18
Balance as of March 31, 2013 at Mar. 31, 2013		$ 1,082	$ 412	$ 236	$ 7,168	$ (454)	$ 6,332	$ 1,030	$ 52

[1] Excludes $18 million attributable to redeemable noncontrolling interest.

[2] Relates to the write-off of noncontrolling interests related to discontinued operations.